/Engine/Source/Runtime/VulkanRHI/Public/VulkanDynamicRHI.h
Lock a staging buffer to read contents on the CPU that were written by the GPU, without having to stall.  This function requires that you have issued an CopyToStagingBuffer invocation and verified that theFRHIGPUFencehas been signaled before calling.
A pointer to the data starting at 'Offset' and of length 'SizeRHI' from 'StagingBuffer', or nullptr when there is an error.
virtual void * RHILockStagingBuffer ( [FRHIStagingBuffer](API\Runtime\RHI\FRHIStagingBuffer) * StagingBuffer, [FRHIGPUFence](API\Runtime\RHI\FRHIGPUFence) * Fence, uint32 Offset, uint32 SizeRHI )